Transmission unit for motor-vehicles.



H. E. GOPPIN, TRANSMISSION UNIT FOR MOTOR VEHICLES.

1909. 2 sans'rs-snnn'r 1.

H E. OOFPIN. TRANSMISSION UNIT FOR MOTOR VEHICLES. APPLICATION FILED NOV. 6,190 8. 935,643, Patented Oct, 5, 1909.

2 SHEETS-SHEET 2,

and State of lvlichigan,

UN ED STATES HOWARD E. OOFFIN, OF DETROIT, MICHIGAN, ASSIGNOR T0 CHALMEES-DETROIT MOTOR COMPANY, OF DETROIT, MICHIGAN,

A CORPORATION OF MICHIGAN.

TRANSMISSION UNIT FOR MOTOR-VEHICLES.

Specification of Letters Patent.

Patented Oct. 5, 194%).

To all whom it may concern:

Be it known that I, :HOWARD E. COFFIN, a citizen of the United States of America, residing at Detroit, in the county of Wayne have invented certain new and useful ImprovementsinTransmission Units for Motor-Vehicles, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to a power transmission mechanism for automobiles.

It is the particular object of the invention to so organize a mechanism, including the variable speed gearing and the main clutch, that it may be removed and replaced as a unit .without dismountiug other parts of the maehine or disassembling the mechanism itselt'.

in the drawings-liigure l is a sectional side elevation; Fig. 2 is a perspective view of the transmission unit detached; and Fig. is a cross-section showing the clutch-open ating mechanism. Fig. 4.- is an end elevation of the clutch.

A is the engine casing, 13 the crank shaft,

(7 the fly wheel, and D an annular extension of the engine casing surrounding the tly wheel.

E is a longitudinal shaft which transmits power to the drive axle (not shown).

intermediate the engine A and the transmission shat't I) isnrrangod my improved transmission unit, which isr-onstrueted as follows: i is a casing which is secured to and supported from the annular housing I) for the tly wheel. This casii'ig has mounted therein a variable speed transmission gear ing of any suitable construction and at the forward end of this transmission gearing is arranged the main power transmission clutch G. The latter is preferably of the multiple-d isk type comprising alternately arranged annular disks H and H, clamping plates l i at opposite ends of the series, and springs .l and bolts K for yieldingly pressing said disks into frictionalcontact. This yiehling pressure is relieved by throwing reaiwvard said clamping plate l, which is :ietuated by a sleeve K connected thereto and engaged by an actuating rock arm L. The disks H are keyed to a head M on the driven shaft N, while the disks H are provided with alin'ed apertured ears O which engage laterally extending drive pins P proecting from the fly wheel C.

The construction of clutch just described I is such that t is removable as a unit-with the casing F, and is separable from the drive pins P of the fly wheel by an axial movement of the case.

In addition to the transmission gearing and the clutch G the detachable transmisfunction of releasing the eluteh (l and for applying the. brake. The clutch operating mechanism consists of a link 5 connected to a rock arm 8 upon the rock shaft S" which actuates the rock arm L operating the sleeve K for releasing the clamping plate I. The brake is actuated by the same lever through the medium of a link ll connected'with the lever B, said link being slotted as at R to provide lost motion so as to permit the clutch to be. released in advance of the application ot the brake.

The connection between the driven shaft Q and the transmission shatt l formed through a universal eoupling eoi'istructed ot' a polygonal socket T for receiving a eorrespondingly shaped head T at the end of the shaft. 1). The socket T is detachably secured to the wheel (Q by suitable means, such as the tap bolts U, and this permits of quickly detaching the shaft E when the transn'iission unitis to be removed.

\Vith the construction as described in use the whole transmission mechanism may be quickly removed or replaced as a unit by merely detaching the socket T and then detaching the casing F from the annular fly wheel housing D, after which an axial movement outward will disengage the disks ll from their drive pins l Thus the unit is removed without dismonnting any of its parts, with exeeption oi the socket member 'l What I claim as my invention is:

l. In a motor vehicle, the.eombination with the motor and transmission shaft, of a ltltl brake, a transmission variable speed gearing and a main clutch intermediate said motor and transmisslon shaft, said brake gearing and clutch being organizedyto be attachable and detachableas a unit from said motor I and transmission shaft.

2. In a motor vehicle, the combination with the motor and transmission shaft, of aprojecting laterally from the motor casing,

a-transmission gearing and a clutch therein,

and a brake without said casing; said clutch having, an axially separable'driving engagement with said motor and being mounted as an organized unit upon said detachable casing. a

4. In a motor vehicle, the combination with the motor and transmission shaft, of an intermediate detachable transmission unit comprising a casing secured to and projecting laterally from. said motor casing, a

transmission gearing and a clutch within said casing, and a pedal lever and intermediate connections for operating saidclutch all mounted upon and removable with said detachable casing. y

5. In a motor vehicle, the combination with a motor and transmission shaft, of an intermediate detachable transmission unit comprising a casing supported by and projecting laterally from said motor casing, a transmission gearing and a clutch within said detachable easing, a brake operating upon the driven shaft of said transmission gearing located at the outer end of said casing, a pedal lever fulcrumed upon said casing, and connections operated by said pedal lever for releasing said clutch and applying said brake. v

In a motor vehicle, the combination with a motor andtransmission shaft, of an intermediate detachable transmission unit comprising a casing supported by and projecting latera'lly from said motor casing, a transmission gearing and a clutch within said casing and a brake for thc'driven shaft ceases of the transmission gearing without said fulcrumed on said casing, and connections for respectively operating said clutch and applying said brake attached to said pedal lever upon opposite sides of the fulcrum thereof; a

with the motor and transmission shaft, of an intermediate detachgble transmission unit comprising a casing supported by and pro jecting laterally from the motor casing, a transmission gearing and a clutch mounted Avithin and a brake mounted without said casing, a common operating mechanism for said clutch and said brake mounted upon and detachable with saidcasing, an axially separable drive connection between said clutch and said motor, and adetachable coupling between the driven shaft of said transmission gearing and said transmission shaft.

8. In a motor vehicle, the combination with the motor and the transmissionshaft, of an intermediate detachable transmission projecting laterally from the motor casing,

ed withinsaidcasing, 21 1.1 axialiy separable drive connection between said clutch and and secured to the driven shaft of said transmission gearmg, and .a coupling to said said brahe'head.

9. In a motor vehicle, the'combination with the motor and the transmission shaft, of a fly,wheel for said motor, an annular housing surrounding said fly wheel, a casing secured to and projecting laterally from said annular housing, a transmission gear: ing within said casing, a clutch mounted upon and detachable with-said casing, and projecting into a recess within said fly 'wheel, a laterally extendin drive pin upon said fiy wheel engaging one member of said clutch and a detachable coupling between the driven shaft of said transmission gearing and said transmission shaft. In testimony whereof I aflix my signature in presence of two Witnesses. I HOWARD E. oorrnt. Witnesses:

JAMES P. BARRY, NELLIE KINSELLA.

casing but mounted thereupon, a pedal lever a transmission gearing and a clutch mount the motor, a brake head without said casing 7. In a motorvehicle, the combinatidn unit comprising a casing supportediby and, 7

transmission shaft detachably mounted on 

